Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa06e06ec354cf50…

MALICIOUS

PDF

42.8 KB Created: 2020-09-06 14:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c00421289b8543384431a44a720da113 SHA-1: 26ccfae8c288b408a2a2c63d975ea9fc0cdd223a SHA-256: aa06e06ec354cf5063ad5c26dddfcf79113f81d6ebab562a4ae5496bcc8880fb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=adobe+acrobat+pro+2017+windows+free', is designed to redirect users to potentially harmful content. The presence of numerous other PDF links, many pointing to benign Shopify domains, suggests a link farm SEO tactic to improve search engine ranking for malicious links. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=adobe+acrobat+pro+2017+windows+free
    • https://cdn.shopify.com/s/files/1/0447/0639/8364/files/data_structures_and_algorithm_notes_in.pdf
    • https://cdn.shopify.com/s/files/1/0465/1109/5958/files/reviewing_biology_the_living_environment_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/bulkhead_transformers_car.pdf
    • https://static.usrfiles.com/ugd/b8c837_12989437c7b045778bc8d97e3161f556.pdf
    • https://static.usrfiles.com/ugd/0b1cf2_b43bf0fcd3af49818c2bea1e71247164.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/gosudavarodomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/interpreting_and_analyzing_financial_statements_6th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/assoinvoice_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/piwataku.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/parker_pneumatic_valve.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/parker_pneumatic_v

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006192.bin
6cbe04e222e4956d6e0386a2cf12b90e427b8abddf43960842bcceff6a157149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 5744 bytes
font_01_sfnt_off0000754e.bin
5242d2a1baaafda801ad01732ad9fbf4bdba32cbb1b620c4e4b132e69e3e8ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754E 12704 bytes

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